branchcache: skip entries that are topological heads in the on disk file
In the majority of cases, topological heads are also branch heads. We have
efficient way to get the topological heads and efficient way to retrieve
their branch information. So there is little value in putting them in the branch
cache file explicitly. On the contrary, writing them explicitly tend to create
very large cache file that are inefficient to read and update.
So the branch cache v3 format is no longer including them. This changeset focus
on the format aspect and have no focus on the performance aspect. We will cover
that later.
Test admin::verify
$ hg init admin-verify
$ cd admin-verify
Test normal output
$ hg admin::verify -c dirstate
running 1 checks
running working-copy.dirstate
checking dirstate
Quiet works
$ hg admin::verify -c dirstate --quiet
Test no check no options
$ hg admin::verify
abort: `checks` required
[255]
Test single check without options
$ hg admin::verify -c working-copy.dirstate
running 1 checks
running working-copy.dirstate
checking dirstate
Test single check (alias) without options
$ hg admin::verify -c dirstate
running 1 checks
running working-copy.dirstate
checking dirstate
Test wrong check name without options
$ hg admin::verify -c working-copy.dir
abort: unknown check working-copy.dir
(did you mean working-copy.dirstate?)
[10]
Test wrong alias without options
$ hg admin::verify -c dir
abort: unknown check dir
[10]